General Information

Immobilizer
P1694 Immobilizer-EMS Message Error - General Information

Component Location





General Description

The PCM and the SMARTRA communicate by dedicated line. During this communication of PCM and SMARTRA, the K line of PCM cannot be used for communication. The PCM controls the communication either to SMARTRA or to other devices(e.g. scanner) on K line by switching of a multiplexer and specific communication procedures. The multiplexer is a part of PCM H/W.

DTC Description

The PCM sets DTC P1694 if Request from EMS is invalid.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data




Fig.1) A normal signal waveform of antenna and immobilizer communication when IG key(TP : Transponder) is OFF to ON.